Process for producing pure flour.



S. BAUMANN.

PROCESS FOR PRODUCING PURE FLOUR. APPLICATION FILED FEB. 3. 1915.

1,%36,658. Patented Aug. 14, 1917.

WIT/mass nwmron W g m SAMUEL BAl/MAfl/A/ A TTOHNEYS K fr TED sra'rae PATE SAMUEL BAULIANN, NEW YORK. N. Y., ASSIGNOB, TO SIMON, IBUHLER & BAUll/IANN 1110., ,OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PROCESS FOR IPItODUGING PURE FLOUR.

. To all item it may) concern."

Be it known that I, SAMUEL BAUM'ANN,a

city, county and State of New York, have invented a certain new and useful Improve ment in Processes for Producing Pure Flour, of which the following is a specification.

My inventionrelates to processes for producing flour and has for its object to produce a flour of maximum whiteness and purity. Heretofore those particles which tend to depreciate the quality of the flour have been permitted to become mixed therewith after the grinding of the wheat or other grain and the mixture then subjected to a purifying or cleaning process. With such processes it is impossible to separate all of said particles from the mixture with the result that some of the objectionable material always remains in the flour to the detrlment of its color and quality. 'This is due to the fact that this objectionable material is of substantialy the same size, shape and weight as the ,flour and for that reason cannot be separated therefrom-by known milling processes. The particular purpose of my improved process is to prevent slich particles as tend to depreciate the quality of the flour from becoming'mixed therewith and to this end consists in separating the same from the flour or millstock immediately after the grinding operation and before a mixture-has been formed. My invention will be fully described hereinafter and the features of novelty will be pointed out in the appended claim. V

. Reference is to be had to the accompanymg drawlngwhich diagrammatically illustrates an apparatus for carrying out my im- 'erly located beneath and to one side of said rollers 1 and2- and are electrified in any convenient way. Beneathsaid electrodes 4 and 5 a hopperfi may be arranged for the purpose'of receiving the material from the electrodes and conducting the same to a bin or other place of storage- In carrying out myimproved process Specification of Letters Patent.

Patented Aug. lll, 191W.

' Application filed February 8, 1915. Serial No. 5,835.

the wheat or other grain is conducted along the chute 3 to the rollers land 2 between which it passes and by which the kernels are ground, being broken up into relatively heavy and large particles of husks, and rel atively light and small particles of husks, and the fiour itself which is of course very light. After being ground up and passing between the rollers 1 and 2 which rotate at I a relatively high speed the heavier particles are thrown outwardly from the said rollers and drop for instance as indicated by the dotted lines 7 The lighter particles at the same'time are not thrown outwardly, at

' least to: any appreciable extent, but are car-v ried alon on the surface of the roller 2 from which they drop approximately as indicated by the, dotted lines 8. In this manner the heavier particles are separated from the lighter, the lighter particles as before stated comprising flour 'and light husk fibers. In dropping from the roller 2 the flour and the light husk fibers pass through an electric field formed by the electrodes 4 and 5 which latter in consequence attract or withdraw all of the lighter husk particles from the falling mass, leaving the flour alone to drop. into a suitable bin' or othercollecting receptacle. Almost immediately the lighter husk particles which have been electrically attracted to the electrodes4 and 5 and have become electrically charged are repelled and drop into the hopper 6 or other device for maintaining them out of contact with the flour.

It will thus be seen that with this process the flour after passing through the grinding operation will not be contaminated by the fiber particles which are temporarily suspended in the air in dropping from the ,grinding rollers In this manner fibrous particles such as smaller bran pieces, which it is substantially impossible to remove from the flour if permitted to become mixed therewith, are positively and completely removedand isolated before having an oppor- I tunity to become mixed with said flour. The flour particles themselves not being 1nfluenced by the electrodes the isolation is Various changes in-the specific method of absolutely assured and. a perfecty pure flour a carrying out my process may be made within the scope of the claim without departing from the spirit of my invention.

I claim:

The process of producing flour which consists in grinding grain under relatively high speed and pro ecting the material by the grinding impetus so as to impose thereon trajectories dependent upon the sizes and weightsof the grains of ground material, subjecting the material having the shorter trajectories t o electrostatic separation while passing through said trajectories, and separately collecting the components thereby se arated.

n testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. j

SAMUEL BAUMANN.

Witnesses:

JOHN A. KEHLENBECK, FRITZ ZIEGLER, Jr. 

